Top Definition
massive boner in your face
Ex 1: shut the fuck up or you'll get a mbiyf.

Ex 2: keep talking dirty to me and get an mbiyf.
by bassix&&avisday April 20, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×